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Fix -Wundef warnings seen in gcc 4.8 #303

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Merged
merged 1 commit into from
Feb 13, 2025
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Fix -Wundef warnings seen in gcc 4.8 #303

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3 changes: 2 additions & 1 deletion include/fast_float/constexpr_feature_detect.h
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@
#endif

// Testing for https://wg21.link/N3652, adopted in C++14
#if __cpp_constexpr >= 201304
#if defined(__cpp_constexpr) && __cpp_constexpr >= 201304
#define FASTFLOAT_CONSTEXPR14 constexpr
#else
#define FASTFLOAT_CONSTEXPR14
Expand All @@ -29,6 +29,7 @@

// Testing for relevant C++20 constexpr library features
#if FASTFLOAT_HAS_IS_CONSTANT_EVALUATED && FASTFLOAT_HAS_BIT_CAST && \
defined(__cpp_lib_constexpr_algorithms) && \
__cpp_lib_constexpr_algorithms >= 201806L /*For std::copy and std::fill*/
#define FASTFLOAT_CONSTEXPR20 constexpr
#define FASTFLOAT_IS_CONSTEXPR 1
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